Campbell, M. (1992). Harward graphics 3 0 a su alcance. Mc Graw Hill.
Cita Chicago (17th ed.)Campbell, Mary. Harward Graphics 3 0 a Su Alcance. Mc Graw Hill, 1992.
Cita MLA (9th ed.)Campbell, Mary. Harward Graphics 3 0 a Su Alcance. Mc Graw Hill, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.